This Delrin spur gear is a scale RC replacement intended for the Tamiya TT02 platform and TT02B variant, supplied as 1pcs and specified as 42 pitch, 70T. It is an aftermarket gear for hobby drivetrain use only and is not for real vehicle applications.
Delrin offers reduced friction and stable dimensions appropriate for spur gear use in RC drivetrains. When fitting, inspect pinion alignment and bearings, keep the gearbox clean, and set correct gear mesh to prevent premature wear.
The 70 tooth count modifies the final drive ratio relative to more common tooth counts on TT02 cars; match the pinion to your motor and ESC to achieve desired performance and reliability.